Birdz Eyewear The Bill Goggle Silver Frame Neutral Grey Lens This goggle has vented cushion foam padding which is an airy foam (not the harder foam seen on riding glasses) vented for maximum breathability. Along with the foam padding, it has a DVS (dual ventilation system) which is an upper and lower ventilation system to maximize air flow and minimize fogging. Lenses are shatterproof polycarbonate, 100%UV protection. These also come with a soft micro-fiber storage bag! Changing the Lenses: To pop out the lenses: First you will be pushing the lenses outward from inside the goggle, not outward facing the front of the goggle. Place your thumb and index finger on the upper, inner corner of each lens (the upper corner closest to the nosepiece) and firmly push outward to pop out. To replace the lenses: Put the top of the lens in (starting with the corner next to the nose) from the OUTSIDE